Working lamp



FIG. 1 is a front view showing my new design;

FIG. 2 is a right view thereof;

FIG. 3 is a left view thereof;

FIG. 4 is a top view thereof;

FIG. 5 is a bottom view thereof;

FIG. 6 is a rear view thereof;

FIG. 7 is a front perspective view thereof; and,

FIG. 8 is a front perspective view of the working lamp when unfolded.

The broken lines show portions of the article not claimed and form no part of the claimed design. 

CLAIM The ornamental design for a working lamp, as shown and described. 